Electric rotary cutter



No. 613,367. Patented Nov. 1, I898.

F. GARDNER.

ELECTRIC ROTARY CUTTER.

(Application filed Mar, 19, 1897. Renewed Jan. 24, 1898.)

(No Model.)

UNITED x STATES PATENT OFFICE.

FULTON GARDNER, OF CHICAGO, ILLINOIS.

ELECTRIC ROTARY CUTTER.

SPECIFICATION forming part of Letters Patent No. 613,367, dated November 1, 1898.

Application filed March 19 1897. Renewed January 24, 1898. Serial No. 667,816. (No model.)

To all whom it may concern:

Be it known that I, FULTON GARDNER, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illi nois, have invented a certain new and useful Improvement in Electric Rotary Gutters, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to an electric rotary cutter, my object being to provide an improved form of cutter operated by electricity and adapted for cutting cloth, paper, and the like.

The cutter of my invention comprises a base-plate upon which is mounted a combined standard and guard, the cutter or knife being mounted on the periphery of the exterior rotating part of a motor secured adj ustably in hangers or the like mounted on the upper portion of the standard and guard, which surrounds and protects the cutter at the rear and upward portions thereof.

Referring to the accompanying drawings, Figure 1 is a view in elevation of the cutter of my invention. Fig. 2 is a transverse sectional view thereof. Fig. 3 is a detail view of the circuit-controller. Fig. 4 is a face view of the motor-commutator.

Like letters refer to like parts in the several figures.

Upon the base-plate a, the edges of which are beveled, are mounted the guard-plates b b, which extend around the periphery of the cutter c, at the rear and top, to protect the edge thereof and prevent the same from coming in contact with the material being out. A handle d is secured to the plates 1) 1), whereby the cutter may be moved over the table or surface upon which the material to be cut is placed. Between the guard-plates at the top a block of metal 6 is placed, and through this block and the guard-plates extends a bolt 6. Upon opposite sides of the guard-plates are provided supporting-arms ff, each provided with a slot f through which passes the bolt 6'. The upper ends of the arms f f are joined by a transverse rod f carrying a tapped hole, in which fits a screw J, the pointed end of which rests upon the block e. By unloosening the bolt 6 and turning the screw f the arms ff may be adj ustably raised or lowered and by tightening up the bolt again can be clamped in the adjusted position. Near the lower end of each of the arms ff a horizontal arm f is provided, preferably formed integrally therewith. A vertical slot f is provided in the end of each of the arms f and a bolt f passes through the slots and the guard plates, which are separated at this point by a block of metal.

Upon the lower ends of the arms ff the shaft g of the motor g is secured. Upon the shaft is mounted the field-magnet h, wound with field-coils h h, the conductors 71. 711 from which extend to the interior of the shaft and out through the same. The shaft is held stationary. Upon the shaft and rotating about the same are disks 70, supporting the armature-core k wound with coils 70 connected with the commutator-bars k 10 Upon the exterior of the armature is secured a drum or casing Z, and to a flange 6 upon the periphery of this casing the cutter c is secured. Upon the shaft g a disk m is secured which fits within the end of the drum-casing Z and carries the brushes 0 0, which are preferably made of carbon and extend through openings in the disk. Springs 0 o are secured to the face of the disk and rest upon the ends of the brushes to hold the same in position and close circuit therethrough. The springs 0 0 are connected with the opposite circuit-wires p p, to which also the field-coil wires 7L2 71 are connected.

The circuit-wires p 10' extend to the bindin gposts r provided with springs 7' 1*, which press against an insulating-bar r mounted in journals r r, and adapted to be rotated by a handle '1. Through the bar 4 extend two conducting-rods s s, and opposite the springs r r on the other side of the rotatable bar are springs 8 8 connected with bindingposts 3 .9 These latter binding-posts are connected with a source of current by conductors t t suspended from above.

The parts of the motor are all within the casing and the motor is suspended from above so that any thickness of material can be out which can pass between the base-plate and the casing.

By means of the bolts and the adjusting-screw the height of the motor may be readily adjusted to adjust the cutter in position.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a rotary cutter, the combination with a base-plate, of a combined standard and peripheral guard extending around the rear and top edges of the cutter, an electric motor having an exterior rotating part, a rotary cutter mounted upon the periphery of said exterior rotating part intermediate between the ends thereof and means for supporting said motor from the upper portion of said guard beyond the ends of the said exterior rotating part, substantially as described.

2. In a rotary cutter, the combination with a base-plate, of a combined standard and peripheral guard extending around the rear and top edges of the cutter, an electric motorhaving an exterior rotating part,- a rotary cutter mounted upon the periphery of said exterior rotating part intermediate between the ends thereof, supporting-arms for said motor mounted upon the upper portion of said guard and secured to the ends of the motor beyond the ends of said exterior rotating part and adjusting means for adj ustably securing the motor in any adjusted position, substantially as described.

3. In a rotary cutter, the combination with a base-plate, of a pair of combined standards and peripheral guard-plates extending about the rear and upper edges of the cutter, an electric motor having an exterior rotating part, a rotary cutter mounted upon the periphery of said exterior rotating part intermediate between the ends thereof, the supporting-arms upon the lower ends of which the motor is supported and each comprising a vertical member adjustably secured at the top of the guard-plates and a horizontal member adjustably secured to the guard-plates at the side, the united ends of said arms be- :ing secured to the ends of the motor beyond the ends of said exterior rotating part, substantially as described.

4. In a rotary cutter, the combination with a base-plate, of a pair of combined standards and peripheral guard-plates, an electric mo' tor, and a rotary cutter mounted upon the exterior rotating part thereof intermediate between the ends thereof, the motor-supporting arms comprising the vertical and horizontal arms secured to the ends of the motor beyond the ends of said exterior rotating part, means for clamping said arms in any adjusted position and an adjusting screw for raising and lowering the motor, substantially as de scribed.

5. In a rotary electric cutter, the combination with a base-plate adapted to pass beneath the material being cut, of a standard mounted thereon and havinga small lateral dimension, an electric motor having an exterior rotating drum or shell and supported at the ends and beyond said exterior rotating part upon said standard, and a circular knife or cutter mounted upon the periphery of said shell or drum intermediate between the ends thereof and arranged to rotate substantially in the plane of said standard, substantially as described.

In Witness whereof I have hereunto subscribed my name in the presence of two witnesses.

FULTON GARDNER.

Vitnesses:

\V. CLYDE JoNns, M. R. Roonronn. 

